Causes

IgA nephropathy is caused by a buildup of the IgA protein in the kidneys. IgA proteins help the body fight infections. There are more of these proteins when you have an infection like the cold or flu.

The protein buildup can damage the filters of the kidneys. These filters are needed to clean the blood as it passes through. If the filters are damaged, then the kidneys are not able to clean the blood. Minor damage to the filters will not cause any changes. Major damage will worsen your health. IgA nephropathy can also cause some blood
and protein
to leak into the urine.

Genetics may play a role in the buildup of IgA proteins in the kidney.

Risk Factors

Factors that increase your chance of IgA nephropathy is a family history of:

Symptoms

Early stages of IgA nephropathy rarely have symptoms.

The first sign of IgA nephropathy is often blood in the urine. It often occurs after an infection like a cold. Small amounts of blood in the urine may only be detected with a test. Larger amounts of blood in the urine can make the urine a pink or cola color.

Later stage symptoms may also include:

Swelling of the hands and feet

Repeated upper respiratory infections

Fatigue

Muscle pain

Fever

Diagnosis

Your doctor will ask about your symptoms and medical history. A physical exam will be done.

Revision Information

This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.